Stadium: Court 1 Round: 25 Ground: Hardcourt outdoor
| ITF M15 Tbilisi | 2021/05/17 05:30 | Keenan Mayo v Nikoloz Davlianidze | 6-7,6-4,10-5 |
| ITF M15 Jerusalem | 2021/05/12 09:35 | Keenan Mayo v Alexander Cozbinov | 2-6,6-4,2-6 |
| ITF M15 Jerusalem | 2021/05/11 06:30 | Keenan Mayo v Omer Yeshaya | 7-6,6-4 |
| ITF M15 Jerusalem | 2021/05/10 11:00 | Keenan Mayo v Ron Ellouck | 6-1,1-6,10-7 |
| ITF M15 Jerusalem | 2021/05/09 08:30 | Keenan Mayo v Mark Neyelov | 6-1,6-1 |
| ITF M15 Ramat Hasharon | 2021/05/03 07:00 | Keenan Mayo v Christophe Clement | 3-6,3-6 |
| ITF M15 Ramat Hasharon | 2021/05/02 07:00 | Keenan Mayo v Tom Saporta | 6-3,6-3 |
| UTR Pro Tennis Series California | 2021/02/21 16:00 | Keenan Mayo v Spencer Johnson | 2-6,6-3,6-4 |
| ITF M15 Antalya | 2021/04/08 07:00 | Markos Kalovelonis v Adam Pavlasek | 6-3,6-7,0-6 |
| ITF M15 Antalya | 2021/04/07 08:50 | Markos Kalovelonis v Cheong-Eui Kim | 6-2,6-4 |
| ITF M15 Monastir | 2021/03/17 10:30 | Savva Polukhin v Markos Kalovelonis | 7-6,6-4 |
| ITF M15 Monastir | 2021/03/07 08:00 | Markos Kalovelonis v Savva Polukhin | 5-7,6-4,6-10 |
| ITF M15 Heraklion | 2020/11/25 07:30 | Markos Kalovelonis v Lucas Gerch | 2-6,2-6 |
| ITF M15 Heraklion | 2020/11/18 07:30 | Evan Furness v Markos Kalovelonis | 6-3,6-4 |
| ITF M15 Heraklion | 2020/11/12 11:00 | Luke Johnson v Markos Kalovelonis | 6-3,6-3 |
| ITF M15 Sharm El Sheikh | 2020/10/18 09:00 | Viacheslav Bielinskyi v Markos Kalovelonis | 4-6,7-6,10-8 |